Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (P300P2 174514)
Swiss Innovation Agency Innosuisse, as part of the Swiss Competence Center for Energy Research SCCER FEEB&D
Text and Data Mining valid from 2019-07-25
Received: 31 December 2018
Accepted: 12 July 2019
First Online: 25 July 2019
: The authors declare that they have no competing interests.